Kenwood TK-2000, Service Manual

Page: 20 / 40

TK-2000
20
ADJUSTMENT
Frequency and Signaling
The transceiver has been adjusted for the frequencies
shown in the following table. When required, re-adjust them
following the adjustment procedure to obtain the frequencies
you want in actual operation.
■
Test Frequency (MHz)
CH RX Frequency TX Frequency
1 155.05000 155.10000
2 136.05000 136.10000
3 173.95000 173.90000
4 155.00000 155.00000
5 155.20000 155.20000
6 155.40000 155.40000
7~16 - -
■
Signaling
No. RX (Decode) TX (Encode)
1 None None
2 None 100Hz Square Wave
3 QT 67.0Hz QT 67.0Hz
4 QT 151.4Hz QT 151.4Hz
5 QT 210.7Hz QT 210.7Hz
6 QT 254.1Hz QT 254.1Hz
7 DQT D023N DQT D023N
8 DQT D754I DQT D754I
9 None
DTMF
(Code: 159D)
10 None
DTMF
(Code: 9)
Preparations for Tuning the Transceiver
Before attempting to tune the transceiver, connect the
unit to a suitable power supply.
Whenever the transmitter is tuned, the unit must be con-
nected to a suitable dummy load (i.e. power meter).
The speaker output connector must be terminated with a
8
Ω
dummy load and connected to an AC voltmeter and an
audio distortion meter or a SINAD measurement meter at all
times during tuning.
■
Adjustment frequency (MHz)
Tuning point RX TX
Low 136.05000 136.10000
Center 155.05000 155.10000
High 173.95000 173.90000
Adjustment Points
TX-RX UNIT
Component side view
Note: When replacing CF200, apply bond to
the point shown in the fi gure.
Foil side view
ANT MIC300
CF200 IC400
CD200
+ ‒
BATT+
BATT–
CV
CV: VCO Lock Voltage
S401
Side KEY
S400
PTT
J301
SP
J300
MIC